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The assessment of uncertainty in mass calibration at national laboratory level

Final Report 1994-01-14

A definitive version of the comparative study of the different procedures adopted by the participants in the processing of the same set of raw weighing data is now available [1]. It is based on the latest versions of the individual reports prepared by each participant. Several discussions on the subject contributed to clarification and harmonisation of the different procedures.

A general model of mass comparisons, taking all the identified influence quantities into account in a multivariate approach, was developed and applied to uncertainty evaluation [2], according to [3]. The participants agree that this is a valuable contribution on which specific procedures may be built by each of them.

It is suggested that a new EUROMET proposal should be formulated on the applicability of the general model to mass metrology.

[1] W. Bich, A. Gosset, C. Yardin, S. Lewis, S. Davidson, M. Gläser, R. Schwartz and L.R. Pendrill, 1994 "EUROMET Project 231 on uncertainty in mass metrology - The assignment of uncertainties to the NPL W43 set of reference weights: a comparative study of the different procedures", IMGC Report P199, 1993, 13 p.

[2] W. Bich, M.G. Cox ad P.M. Harris, 1993 "Uncertainty Modelling in Mass Comparisons", Metrologia 30, 5, 1993

[3] ISO, 1993 "Guide to the Expression of Uncertainty in Measurement", Switzerland, First ed., 1993

Subjects
Mass and Related Quantities (M)
Coordinating Institute
INRIM (Italy)

Information

Reg. No.
231
Collaboration Type
Research
Status
completed
Starting
1990-11-19
Completion
1994-01-14